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<td ><a href="../qtdoc/index.html">Qt 5.12</a></td><td ><a href="qtquick-index.html">Qt Quick 模块</a></td><td ><a href="qtquick-module.html">C++ 类</a></td><td >QSGAbstractRenderer</td></tr></table><table class="buildversion"><tr>
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<li class="level1"><a href="#public-types">公用类型</a></li>
<li class="level1"><a href="#public-functions">公用函数</a></li>
<li class="level1"><a href="#signals">信号</a></li>
<li class="level1"><a href="#static-public-members">静态公用成员</a></li>
<li class="level1"><a href="#details">详细信息</a></li>
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<h1 class="title">QSGAbstractRenderer 类</h1>
<!-- $$$QSGAbstractRenderer-brief -->
<p><a href="qsgabstractrenderer.html">QSGAbstractRenderer</a> gives access to the scene graph nodes and rendering of a <a href="qsgengine.html">QSGEngine</a>. <a href="#details">更多...</a></p>
<!-- @@@QSGAbstractRenderer -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign">头文件：</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QSGAbstractRenderer&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += quick</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 5.4</td></tr><tr><td class="memItemLeft rightAlign topAlign">继承自：</td><td class="memItemRight bottomAlign"> <a href="../qtcore/qobject.html">QObject</a></td></tr></table></div><ul>
<li><a href="qsgabstractrenderer-members.html">所有成员的列表，包括继承成员</a></li>
<li><a href="qsgabstractrenderer-obsolete.html">废弃的成员</a></li>
</ul>
<a name="public-types"></a>
<h2 id="public-types">公用类型</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> flags </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#ClearModeBit-enum">ClearMode</a></b></td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#ClearModeBit-enum">ClearModeBit</a></b> { ClearColorBuffer, ClearDepthBuffer, ClearStencilBuffer }</td></tr>
</table></div>
<a name="public-functions"></a>
<h2 id="public-functions">公用函数</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> QColor </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#clearColor">clearColor</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QSGAbstractRenderer::ClearMode </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#clearMode">clearMode</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QRect </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#deviceRect">deviceRect</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QMatrix4x4 </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#projectionMatrix">projectionMatrix</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#renderScene">renderScene</a></b>(uint <i>fboId</i> = ...) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QSGRootNode *</td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#rootNode">rootNode</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#setClearColor">setClearColor</a></b>(const QColor &amp;<i>color</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#setClearMode">setClearMode</a></b>(QSGAbstractRenderer::ClearMode <i>mode</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#setDeviceRect">setDeviceRect</a></b>(const QRect &amp;<i>rect</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#setDeviceRect-1">setDeviceRect</a></b>(const QSize &amp;<i>size</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#setProjectionMatrix">setProjectionMatrix</a></b>(const QMatrix4x4 &amp;<i>matrix</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#setProjectionMatrixToRect">setProjectionMatrixToRect</a></b>(const QRectF &amp;<i>rect</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#setRootNode">setRootNode</a></b>(QSGRootNode *<i>node</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#setViewportRect">setViewportRect</a></b>(const QRect &amp;<i>rect</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#setViewportRect-1">setViewportRect</a></b>(const QSize &amp;<i>size</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QRect </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#viewportRect">viewportRect</a></b>() const</td></tr>
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<ul>
<li class="fn">31 个公用函数继承自<a href="../qtcore/qobject.html#public-functions">QObject</a></li>
</ul>
<a name="signals"></a>
<h2 id="signals">信号</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#sceneGraphChanged">sceneGraphChanged</a></b>()</td></tr>
</table></div>
<ul>
<li class="fn">2 个信号继承自<a href="../qtcore/qobject.html#signals">QObject</a></li>
</ul>
<a name="static-public-members"></a>
<h2 id="static-public-members">静态公用成员</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> const QMetaObject </td><td class="memItemRight bottomAlign"><b><a href="qsgabstractrenderer.html#staticMetaObject-var">staticMetaObject</a></b></td></tr>
</table></div>
<ul>
<li class="fn">9 个静态公用成员继承自<a href="../qtcore/qobject.html#static-public-members">QObject</a></li>
</ul>
<h3>额外的继承成员</h3>
<ul>
<li class="fn">1 个属性继承自<a href="../qtcore/qobject.html#properties">QObject</a></li>
<li class="fn">1 个公用槽函数继承自<a href="../qtcore/qobject.html#public-slots">QObject</a></li>
<li class="fn">9 个保护函数继承自<a href="../qtcore/qobject.html#protected-functions">QObject</a></li>
</ul>
<a name="details"></a>
<!-- $$$QSGAbstractRenderer-description -->
<div class="descr">
<h2 id="details">详细信息</h2>
<p><a href="qsgabstractrenderer.html">QSGAbstractRenderer</a> gives access to the scene graph nodes and rendering of a <a href="qsgengine.html">QSGEngine</a>.</p>
<p>A <a href="qsgabstractrenderer.html">QSGAbstractRenderer</a> created by a <a href="qsgengine.html">QSGEngine</a> allows you to set your <a href="qsgnode.html">QSGNode</a> tree through <a href="qsgabstractrenderer.html#setRootNode">setRootNode</a>() and control the rendering viewport through <a href="qsgabstractrenderer.html#setDeviceRect">setDeviceRect</a>(), <a href="qsgabstractrenderer.html#setViewportRect">setViewportRect</a>() and <a href="qsgabstractrenderer.html#setProjectionMatrixToRect">setProjectionMatrixToRect</a>(). You can finally trigger the rendering to the desired framebuffer through <a href="qsgabstractrenderer.html#renderScene">renderScene</a>().</p>
<p>The <a href="qsgabstractrenderer.html">QSGAbstractRenderer</a> is only available when used with a <a href="qsgengine.html">QSGEngine</a> and isn't exposed when used internally by <a href="qquickwindow.html">QQuickWindow</a>.</p>
</div>
<p><b>请参考 </b><a href="qsgengine.html">QSGEngine</a> 和 <a href="qsgnode.html">QSGNode</a>。</p>
<!-- @@@QSGAbstractRenderer -->
<div class="types">
<h2>成员类型文档</h2>
<!-- $$$ClearModeBit$$$ClearColorBuffer$$$ClearDepthBuffer$$$ClearStencilBuffer -->
<h3 class="flags" id="ClearModeBit-enum"><a name="ClearModeBit-enum"></a>enum QSGAbstractRenderer::<span class="name">ClearModeBit</span><br/>flags QSGAbstractRenderer::<span class="name">ClearMode</span></h3>
<p>Used with <a href="qsgabstractrenderer.html#setClearMode">setClearMode</a>() to indicate which buffer should be cleared before the scene render.</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>QSGAbstractRenderer::ClearColorBuffer</code></td><td class="topAlign tblval"><code>0x0001</code></td><td class="topAlign">Clear the color buffer using <a href="qsgabstractrenderer.html#clearColor">clearColor</a>().</td></tr>
<tr><td class="topAlign"><code>QSGAbstractRenderer::ClearDepthBuffer</code></td><td class="topAlign tblval"><code>0x0002</code></td><td class="topAlign">Clear the depth buffer.</td></tr>
<tr><td class="topAlign"><code>QSGAbstractRenderer::ClearStencilBuffer</code></td><td class="topAlign tblval"><code>0x0004</code></td><td class="topAlign">Clear the stencil buffer.</td></tr>
</table></div>
<p>The ClearMode type is a typedef for <a href="../qtcore/qflags.html">QFlags</a>&lt;ClearModeBit&gt;. It stores an OR combination of ClearModeBit values.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#setClearMode">setClearMode</a>() 和 <a href="qsgabstractrenderer.html#setClearColor">setClearColor</a>()。</p>
<!-- @@@ClearModeBit -->
</div>
<div class="func">
<h2>成员函数文档</h2>
<!-- $$$clearColor[overload1]$$$clearColor -->
<h3 class="fn" id="clearColor"><a name="clearColor"></a><span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> QSGAbstractRenderer::<span class="name">clearColor</span>() const</h3>
<p>Returns the color that clears the framebuffer at the beginning of the rendering.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#setClearColor">setClearColor</a>() 和 <a href="qsgabstractrenderer.html#clearMode">clearMode</a>()。</p>
<!-- @@@clearColor -->
<!-- $$$clearMode[overload1]$$$clearMode -->
<h3 class="fn" id="clearMode"><a name="clearMode"></a><span class="type"><a href="qsgabstractrenderer.html#ClearModeBit-enum">QSGAbstractRenderer::ClearMode</a></span> QSGAbstractRenderer::<span class="name">clearMode</span>() const</h3>
<p>Flags defining which attachment of the framebuffer will be cleared before each scene render.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#setClearMode">setClearMode</a>() 和 <a href="qsgabstractrenderer.html#clearColor">clearColor</a>()。</p>
<!-- @@@clearMode -->
<!-- $$$deviceRect[overload1]$$$deviceRect -->
<h3 class="fn" id="deviceRect"><a name="deviceRect"></a><span class="type"><a href="../qtcore/qrect.html">QRect</a></span> QSGAbstractRenderer::<span class="name">deviceRect</span>() const</h3>
<p>Returns the device rect of the surface being rendered to.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#setDeviceRect">setDeviceRect</a>()。</p>
<!-- @@@deviceRect -->
<!-- $$$projectionMatrix[overload1]$$$projectionMatrix -->
<h3 class="fn" id="projectionMatrix"><a name="projectionMatrix"></a><span class="type"><a href="../qtgui/qmatrix4x4.html">QMatrix4x4</a></span> QSGAbstractRenderer::<span class="name">projectionMatrix</span>() const</h3>
<p>Returns the projection matrix</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#setProjectionMatrix">setProjectionMatrix</a>() 和 <a href="qsgabstractrenderer.html#setProjectionMatrixToRect">setProjectionMatrixToRect</a>()。</p>
<!-- @@@projectionMatrix -->
<!-- $$$renderScene[overload1]$$$renderSceneuint -->
<h3 class="fn" id="renderScene"><a name="renderScene"></a><code>[pure virtual] </code><span class="type">void</span> QSGAbstractRenderer::<span class="name">renderScene</span>(<span class="type"><a href="../qtcore/qtglobal.html#uint-typedef">uint</a></span> <i>fboId</i> = ...)</h3>
<p>Render the scene to the specified <i>fboId</i></p>
<p>If <i>fboId</i> isn't specified, the scene graph will be rendered to the default framebuffer. You will have to call <a href="../qtgui/qopenglcontext.html#swapBuffers">QOpenGLContext::swapBuffers</a>() yourself afterward.</p>
<p>The framebuffer specified by <i>fboId</i> will be bound automatically.</p>
<p><b>请参考 </b><a href="../qtgui/qopenglcontext.html#swapBuffers">QOpenGLContext::swapBuffers</a>() 和 <a href="../qtgui/qopenglframebufferobject.html#handle">QOpenGLFramebufferObject::handle</a>()。</p>
<!-- @@@renderScene -->
<!-- $$$rootNode[overload1]$$$rootNode -->
<h3 class="fn" id="rootNode"><a name="rootNode"></a><span class="type">QSGRootNode</span> *QSGAbstractRenderer::<span class="name">rootNode</span>() const</h3>
<p>Returns the root of the <a href="qsgnode.html">QSGNode</a> scene.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#setRootNode">setRootNode</a>()。</p>
<!-- @@@rootNode -->
<!-- $$$sceneGraphChanged[overload1]$$$sceneGraphChanged -->
<h3 class="fn" id="sceneGraphChanged"><a name="sceneGraphChanged"></a><code>[signal] </code><span class="type">void</span> QSGAbstractRenderer::<span class="name">sceneGraphChanged</span>()</h3>
<p>This signal is emitted on the first modification of a node in the tree after the last scene render.</p>
<!-- @@@sceneGraphChanged -->
<!-- $$$setClearColor[overload1]$$$setClearColorconstQColor& -->
<h3 class="fn" id="setClearColor"><a name="setClearColor"></a><span class="type">void</span> QSGAbstractRenderer::<span class="name">setClearColor</span>(const <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> &amp;<i>color</i>)</h3>
<p>Use <i>color</i> to clear the framebuffer when <a href="qsgabstractrenderer.html#clearMode">clearMode</a>() is set to <a href="qsgabstractrenderer.html#ClearModeBit-enum">QSGAbstractRenderer::ClearColorBuffer</a>.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#clearColor">clearColor</a>() 和 <a href="qsgabstractrenderer.html#setClearMode">setClearMode</a>()。</p>
<!-- @@@setClearColor -->
<!-- $$$setClearMode[overload1]$$$setClearModeQSGAbstractRenderer::ClearMode -->
<h3 class="fn" id="setClearMode"><a name="setClearMode"></a><span class="type">void</span> QSGAbstractRenderer::<span class="name">setClearMode</span>(<span class="type"><a href="qsgabstractrenderer.html#ClearModeBit-enum">QSGAbstractRenderer::ClearMode</a></span> <i>mode</i>)</h3>
<p>Defines which attachment of the framebuffer should be cleared before each scene render with the <i>mode</i> flag.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#clearMode">clearMode</a>() 和 <a href="qsgabstractrenderer.html#setClearColor">setClearColor</a>()。</p>
<!-- @@@setClearMode -->
<!-- $$$setDeviceRect[overload1]$$$setDeviceRectconstQRect& -->
<h3 class="fn" id="setDeviceRect"><a name="setDeviceRect"></a><span class="type">void</span> QSGAbstractRenderer::<span class="name">setDeviceRect</span>(const <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> &amp;<i>rect</i>)</h3>
<p>Sets <i>rect</i> as the geometry of the surface being rendered to.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#deviceRect">deviceRect</a>()。</p>
<!-- @@@setDeviceRect -->
<!-- $$$setDeviceRect$$$setDeviceRectconstQSize& -->
<h3 class="fn" id="setDeviceRect-1"><a name="setDeviceRect-1"></a><span class="type">void</span> QSGAbstractRenderer::<span class="name">setDeviceRect</span>(const <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> &amp;<i>size</i>)</h3>
<p>这是一个重载函数。</p>
<p>Sets the <i>size</i> of the surface being rendered to.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#deviceRect">deviceRect</a>()。</p>
<!-- @@@setDeviceRect -->
<!-- $$$setProjectionMatrix[overload1]$$$setProjectionMatrixconstQMatrix4x4& -->
<h3 class="fn" id="setProjectionMatrix"><a name="setProjectionMatrix"></a><span class="type">void</span> QSGAbstractRenderer::<span class="name">setProjectionMatrix</span>(const <span class="type"><a href="../qtgui/qmatrix4x4.html">QMatrix4x4</a></span> &amp;<i>matrix</i>)</h3>
<p>Use <i>matrix</i> to project the <a href="qsgnode.html">QSGNode</a> coordinates onto surface pixels.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#projectionMatrix">projectionMatrix</a>() 和 <a href="qsgabstractrenderer.html#setProjectionMatrixToRect">setProjectionMatrixToRect</a>()。</p>
<!-- @@@setProjectionMatrix -->
<!-- $$$setProjectionMatrixToRect[overload1]$$$setProjectionMatrixToRectconstQRectF& -->
<h3 class="fn" id="setProjectionMatrixToRect"><a name="setProjectionMatrixToRect"></a><span class="type">void</span> QSGAbstractRenderer::<span class="name">setProjectionMatrixToRect</span>(const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &amp;<i>rect</i>)</h3>
<p>Convenience method that calls <a href="qsgabstractrenderer.html#setProjectionMatrix">setProjectionMatrix</a>() with an orthographic matrix generated from <i>rect</i>.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#setProjectionMatrix">setProjectionMatrix</a>() 和 <a href="qsgabstractrenderer.html#projectionMatrix">projectionMatrix</a>()。</p>
<!-- @@@setProjectionMatrixToRect -->
<!-- $$$setRootNode[overload1]$$$setRootNodeQSGRootNode* -->
<h3 class="fn" id="setRootNode"><a name="setRootNode"></a><span class="type">void</span> QSGAbstractRenderer::<span class="name">setRootNode</span>(<span class="type">QSGRootNode</span> *<i>node</i>)</h3>
<p>Sets the <i>node</i> as the root of the <a href="qsgnode.html">QSGNode</a> scene that you want to render. You need to provide a <i>node</i> before trying to render the scene.</p>
<p><b>Note: </b>This doesn't take ownership of <i>node</i>.</p><p><b>See also </b><a href="qsgabstractrenderer.html#rootNode">rootNode</a>().</p>
<!-- @@@setRootNode -->
<!-- $$$setViewportRect[overload1]$$$setViewportRectconstQRect& -->
<h3 class="fn" id="setViewportRect"><a name="setViewportRect"></a><span class="type">void</span> QSGAbstractRenderer::<span class="name">setViewportRect</span>(const <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> &amp;<i>rect</i>)</h3>
<p>Sets <i>rect</i> as the geometry of the viewport to render on the surface.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#viewportRect">viewportRect</a>()。</p>
<!-- @@@setViewportRect -->
<!-- $$$setViewportRect$$$setViewportRectconstQSize& -->
<h3 class="fn" id="setViewportRect-1"><a name="setViewportRect-1"></a><span class="type">void</span> QSGAbstractRenderer::<span class="name">setViewportRect</span>(const <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> &amp;<i>size</i>)</h3>
<p>这是一个重载函数。</p>
<p>Sets the <i>size</i> of the viewport to render on the surface.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#viewportRect">viewportRect</a>()。</p>
<!-- @@@setViewportRect -->
<!-- $$$viewportRect[overload1]$$$viewportRect -->
<h3 class="fn" id="viewportRect"><a name="viewportRect"></a><span class="type"><a href="../qtcore/qrect.html">QRect</a></span> QSGAbstractRenderer::<span class="name">viewportRect</span>() const</h3>
<p>Returns the rect of the viewport to render.</p>
<p><b>请参考 </b><a href="qsgabstractrenderer.html#setViewportRect">setViewportRect</a>()。</p>
<!-- @@@viewportRect -->
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